Модальные или POPUP окна - изменение дизайна.

/*---Диалоговые и всплывающие окна jQuery UI---*/
.ui-corner-all {-moz-border-radius: 5px; -webkit-border-radius: 5px; border-radius: 5px; }
.ui-button{border-radius:2px; -moz-border-radius:2px; -webkit-border-radius:2px; -khtml-border-radius: 2px border:1px solid #b4b4b4; background:#dadada url(../images/but_g.png) repeat-x;color:#555;font-size:11px;font-family: Tahoma, Verdana, Arial, sans-serif, Lucida Sans;text-shadow:0px 1px 0px #fff;border:0px;border-top:1px solid #fff;overflow:hidden;padding:4px 8px;float:right;cursor:pointer;margin-left:5px;min-width:80px;text-align:center;outline:none}
.ui-button:hover {background:#e5e5e5 url(../images/but_gh2.gif) repeat-x}
.ui-button:active {background:#e5e5e5;position:relative;border-top:1px solid #e5e5e5;outline:none}

.ui-icon{background-repeat:no-repeat;display:block;overflow:hidden;text-indent:-99999px}
.ui-widget{font-family:Tahoma,LucidaSans,sans-serif;font-size:11px;color:#000000}
.ui-widget input, .ui-widget select, .ui-widget textarea, .ui-widget button{outline: none; font-family:tahoma,sans-serif;font-size:11px}
.ui-widget-content{background:#000;background:rgba(0, 0, 0, 0.7);border:0px;box-shadow:0 5px 10px rgba(0, 0, 0, 0.6);-moz-box-shadow:0 5px 10px rgba(0, 0, 0, 0.6);-webkit-box-shadow:0  5px 10px rgba(0, 0, 0, 0.6);padding:0px 7px 7px 7px}
.ui-dialog-content{background:#fff !important;border-radius:2px;-moz-border-radius:2px;-webkit-border-radius:2px;border:0px;padding:4px;box-shadow:0  0 3px #000;-moz-box-shadow:0 0 3px #000;-webkit-box-shadow:0 0 3px  #000}
.ui-dialog-content input[type="text"], .ui-dialog-content textarea{outline: none; background:#fff;color:#000000;border:1px solid  #DDD;box-shadow:none;-moz-box-shadow:none;-webkit-box-shadow:none}
.ui-dialog-content td a { border: none; outline: none; background: none; text-decoration: none; }
.ui-dialog-content a { border: none; outline: none; background: none; text-decoration: none; }
.ui-widget-header{background:none;border:0px;color:#fff;font-weight:bold;font-size:8pt;font-family:Tahoma,arial;padding:7px  0px 7px 0px !important}
.ui-state-error{background:#fef1ec 50% 50% repeat-x;border:1px solid #cd0a0a;color:#cd0a0a}
.ui-dialog-titlebar-close{display:block;position:absolute;top:6px;right:0px;width:15px !important;height:15px !important;padding:0px;border:0px;background:url(../images/dialog-close.png) no-repeat center center;-moz-transition:all 0.2s ease;-webkit-transition:all 0.2s ease;transition:all 0.2s ease;opacity:0.4}
.ui-dialog-titlebar-close:hover{opacity:1.0}
.ui-dialog{overflow:hidden;border-radius:5px;-moz-border-radius:5px;-webkit-border-radius:5px;position:absolute;width:300px}
.ui-dialog .ui-dialog-titlebar{position:relative}
.ui-dialog .ui-dialog-content{background:none;border:0;overflow:hidden;position:relative}
.ui-dialog .ui-dialog-buttonpane{border:0px;margin:0px;border:0px;padding:7px 0px  0px  0px;float:right;box-shadow:none;-moz-box-shadow:none;-webkit-box-shadow:none;background:none}
.ui-dialog .ui-resizable-se{bottom:3px;height:14px;right:3px;width:14px}
.ui-widget-overlay{position:absolute;top:0px;left:0px;background:rgba(0,0,0,0.5)}

/*---Автозаполнение облака тегов---*/
.ui-autocomplete{position:absolute;cursor:default}
* html .ui-autocomplete{width:1px}
.ui-menu{list-style:none;padding:2px;margin:0;display:block;float:left}
.ui-menu .ui-menu{margin-top: -3px}
.ui-menu .ui-menu-item{margin:0;padding:0;zoom:1;float:left;clear:left;width:100%}
.ui-menu .ui-menu-item a{text-decoration:none;display:block;padding:.2em .4em;line-height:1.5;zoom:1}
.ui-menu .ui-menu-item a.ui-state-hover,
.ui-menu .ui-menu-item a.ui-state-active{font-weight:normal;margin: -1px}